FBSM can vary widely.  Some offer all kinds of sexual services, others just lingam massage in addition to bodywork.  Expect bodywork, and usually some kind of orgasmic activity.  After that the differences are considerable.  Going to a massage parlor is different from an indy.  Tantric is different from other experiences.  Is she a CMT or not?  All this will effect the session.  Again, reviews are your friend.  If you can be specific about what you want, posting on your regional board or ISO is always an option.

You get a massage, flip over, get a little more massage, and then a hand job.

Now the quality of these varies greatly.  I would say in general that you will get a much better massage and hand job from a tantric provider, but the cost will also be commensurate.

Read the reviews to know best.

After you see a FBSM provider for a while, and she likes you and feels comfortable, you might get offered a wider menu, but the fee will also go up somewhat.

All very helpful answers.  I wasn't sure if FBSM also included Body to Body massage but I guess it depends on the provider.   Never tried an FBSM before and didn't want to reach out to touch her and have her slap me in the face.